A buddy is visiting and as we were photographing pumpkins this morning his Sekon ic L 508 zoom meter stopped working and now when he turns it on is shows E5 on t he display. It does nothing else. We changed the battery & no luck and no differ ence. His manual is home in Kansas & he is going to Death Valley in the next few days. Any quick fix on this one? We already tried changing the battery & it did n't help.